The inability to speak properly because of the genormityness of the person’s lips. Usually referring to African Americans with abnormally large lips and who sound like they are trying to speak with a mouth full of marshmallows.

Native Language of Jamaal Charles, Running Back for the Texas Longhorns. Language consists of whole sentences combined into one "word". Also, great emphasis is put on repeating one syllabus of a word over and over and over. Not understood by 99.998% of the world's population.

Despite speaking Mush-Mouth, Jamaal excels in academics at the University of da da da Texas.

a term used to describe a state of intoxication in which the individual cannot speak properly or when the intoxicated individual makes random remarks having nothing to do with the preceding conversation.

Mush mouth is a particularly interesting oral sex technique involving crackers (typically saltines but anything dry will work). It is performed by chewing up enough crackers to render one incapable of speaking clearly, receiving a load in the mouth, mixing it all together, then slowly pushing it out of the mouth to run all over the face and make a gunky mess.